Study on the formation process of low‐temperature ash deposition induced by ammonium bisulfate in pulverized coal‐fired boiler

2019 ◽  
Vol 15 (1) ◽  
Author(s):  
Limin Wang ◽  
Yufan Bu ◽  
Chunli Tang ◽  
Cheng Lv ◽  
Xun Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Formation Process ◽  
Pulverized Coal ◽  
Ash Deposition ◽  
Ammonium Bisulfate

Study of high-pressure air jet controlled compression ignition with compound thermodynamic cycle for combustion and emission formation process

2020 ◽  
pp. 146808742096933
Author(s):  
Xiangyu Meng ◽  
Sicheng Liu ◽  
Jingchen Cui ◽  
Jiangping Tian ◽  
Wuqiang Long ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Low Temperature ◽  
Formation Process ◽  
Combustion Process ◽  
Thermodynamic Cycle ◽  
Compression Ignition ◽  
Temperature Reaction ◽  
Air Jet ◽  
High Temperature Reaction

A novel method called high-pressure air (HPA) jet controlled compression ignition (JCCI) based on the compound thermodynamic cycle was investigated in this work. The combustion process of premixed mixture can be controlled flexibly by the high-pressure air jet compression, and it characterizes the intensified low-temperature reaction and two-stage high-temperature reaction. The three-dimensional (3D) computational fluid dynamics (CFD) numerical simulation was employed to study the emission formation process and mechanism, and the effects of high-pressure air jet temperature and duration on emissions were also investigated. The simulation results showed that the NOx formation is mainly affected by the first-stage high-temperature reaction due to the higher reaction temperature. Overall, this combustion mode can obtain ultra-low NOx emission. The second-stage high-temperature reaction plays an important role in the CO and THC formation caused by the mixing effect of the high-pressure air and original in-cylinder mixture. The increasing air jet temperature leads to a larger high-temperature in-cylinder region and more fuel in the first-stage reaction, and therefore resulting in higher NOx emission. However, the increasing air jet temperature can significantly reduce the CO and THC emissions. For the air jet duration comparisons, both too short and too long air jet durations could induce higher NOx emission. A higher air jet duration would result in higher CO emission due to the more high-pressure air jet with relatively low temperature.

Low-temperature ash deposition and dewpoint corrosion of a coal-fired travelling grate boiler

2017 ◽  
Vol 117 ◽  
pp. 752-761 ◽  
Author(s):  
Heng Chen ◽  
Peiyuan Pan ◽  
Jian Jiao ◽  
Yungang Wang ◽  
Qinxin Zhao
Keyword(s):  
Low Temperature ◽  
Ash Deposition

An Experimental Study on Ash Deposition Problem of Low-Low Temperature Flue Gas System

2021 ◽  
pp. 897-909
Author(s):  
Yu Yan ◽  
Jiahao Jiang ◽  
Jin Guo ◽  
Yuesheng Li ◽  
Lei Deng ◽  
...  
Keyword(s):  
Experimental Study ◽  
Low Temperature ◽  
Flue Gas ◽  
Ash Deposition ◽  
Gas System

On Ash Deposition Rates from Air and Oxy-Combustion of Pulverized Coal, Petroleum Coke, and Biomass

2019 ◽  
Vol 33 (7) ◽  
pp. 5849-5858 ◽  
Author(s):  
Yueming Wang ◽  
Xiaolong Li ◽  
Jost O. L. Wendt
Keyword(s):  
Petroleum Coke ◽  
Pulverized Coal ◽  
Ash Deposition ◽  
Deposition Rates

Control of ash deposition in pulverized coal fired boiler

2009 ◽  
Vol 32 (2) ◽  
pp. 2709-2716 ◽  
Author(s):  
Hiroshi Naganuma ◽  
Nobuya Ikeda ◽  
Takayuki Kawai ◽  
Tsuyoshi Takuwa ◽  
Tadashi Ito ◽  
...  
Keyword(s):  
Pulverized Coal ◽  
Ash Deposition
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